Quad wont start got spark got fuel and got compression

For the engine to run, it needs spark, fuel and compression. You can check the spark by removing the spark plug and grounding the electrode against the cylinder head. When cranking, you should see the spark across the spark gap. You could also use starting fluid to see if you have a fuel problem. If it starts at all on starter fluid, but then stops, then you probably have fuel problem. A compression tester will tell you if you have a compression problem.

Do you have fire at the spark plug. If so check compression, then if not check fuel system(( carb)

Make sure you have compression and fuel too.

just for fun, while you're cranking it put your hand over the intake of the carb completely covering it and see if your hand gets wet with gas. this might even start it too.

chances are the carburetor is set too lean, turn the screw all the way in and then back it out 1 1/4 turns, then adjust in 1/4 turn increments to get it running at peak performance.

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There could be a few different reasons why your 50cc Apache quad has suddenly stopped starting after starting with the kick start a few times. Some possible causes include:

1. Fuel issues: Make sure you have enough fuel in the tank and that the fuel is fresh. Also, check the fuel filter to ensure it's not clogged.
2. Air filter: A clogged air filter can restrict airflow to the engine, making it difficult to start. Check the air filter and clean or replace it if necessary.
3. Spark plug: A fouled or worn spark plug can prevent the engine from starting. Check the spark plug and replace it if necessary.
4. Battery: A weak or dead battery can prevent the engine from starting. Check the battery and charge or replace it if necessary.
5. Compression: low compression can cause the engine to not start.
6. Choke: Make sure that the choke is working properly.

It's possible that one or more of these issues may be causing the problem. It is recommend to check the owner's manual for troubleshooting and further guidance. If the problem persist, it is best to take it to a qualified mechanic for diagnosis and repair.

only thing left is compression.

The valve may be off a bit get the valve specs and check it usually the intake valve that causes that you will have compression but it it will stay open just enough that it won't start

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To check the spark put the spark plug in the cap and rest the tip of the spark plug on the head of the engine and crank it over. You should see a strong spark.
(Remember doing this creates electricity so don't touch the tip)